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[Review of methods of dietary assessment during pregnant] Metodos de avaliacao do consumo alimentar de gestantes: uma revisao.
Revista Brasileira de Saude Materno Infantil. 2006 Oct-Dec; 6(4):383-390.Physiological pregnancy changes impact nutritional needs and food intake. The adequate use of tools providing knowledge of food consumption during this life cycle is relevant because it enables the diagnosis for possible nutrition deficits and excesses. The objective of the survey was to perform a bibliographic review on food intake assessment methods during pregnancy. The literature reviewed was selected from an electronic database published between 1994 and September 2004 in Brazil and abroad. This article aims at describing and assessing the different methods and main results of studies determining food intake during pregnancy, among them, the following are highlighted: 24 hour recall, food registration, questionnaire on food intake consumption and food history. The results determine that the 24 hour recall method was the one more frequently used, nevertheless, for many times it was not applied beyond a two day investigation period and it did not take weekends into account. The choice for this method is related to pragmatism and a favorable cost benefit ratio. The conclusion is that to obtain reliable results, the choice of method and study design should always be related to the objectives of the enquiry. (author's)